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    40 Calhoun St Charleston, SC 29401

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    40 Calhoun St Charleston, SC 29401

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    • Office buildings
    • 43,550 SF
    • 1.33 lot acres
    For Lease
    $39 SF/Yr
    View Listing →
    Class A Office Space For Lease
    $39 SF/Yr

    Class A Office Space

    Walkable campus with office and service-related businesses.

    40 Calhoun St, Charleston, SC 29401
    View Listing
    Property ID
    US77-1182051
    The Realmo ID is a unique identifier assigned to every property, incorporating country codes and precise geo-coordinates for 300x300-foot land blocks. It enables standardized data collection and seamless integration of disparate sources such as ownership, tax, title data and physical specifications. By aggregating current and historical records, the Realmo ID powers advanced analytics and delivers deep, verifiable insights for real estate professionals.
    Value Estimations
    Cap Rate Potential
    Location Intelligence

    Current Use by Public Records

    • Moore & Van Allen: Heichelbech Jenny M / Law Firm
    • Timothy J. W. Muller, Esq. / Law Firm
    • The Steadman Agency / Insurance Agency
    • MassMutual South Carolina / Financial Advisor
    • Palmer & Cay / Insurance Agency

    Property Details for 40 Calhoun St

    Year built
    2006
    Lot size
    1.33 lot acres
    Property size
    43,550 SF
    Property type
    Office buildings
    APN
    459-13-04-014
    APU
    4591304014

    Description

    Charleston Gateway Campus offers 123,005 square feet of Class A office space in a vibrant, walkable complex. The property, built in 2006, features a diverse tenant mix, primarily legal, insurance, and financial services firms, alongside retail and restaurant spaces. Available spaces range from move-in-ready executive suites of 314 square feet to larger, customizable floor plans up to 9,375 contiguous square feet, with a minimum divisible space of 1,356 square feet. Currently, 14,165 square feet are vacant. The campus boasts a planned redevelopment including outdoor seating and dining areas, and a large courtyard accessible from Washington Street. Its prime location at the intersection of Calhoun and East Bay Streets offers excellent visibility and proximity to I-26 and the Ravenel Bridges. Amenities include on-site parking (leasing at $175/month), additional parking options at nearby garages ($160/month), a backup generator, and after-hours access to a rooftop with harbor views (by reservation). Building 480 East Bay offers shell condition spaces ideal for retail, restaurant, or office use, including Suite E with high, exposed ceilings and skylights. The 40 Calhoun building offers full-service office space. South Atlantic Bank and Liberty Place are among the existing tenants.

    Value Estimations

    based on Realmo’s proprietary methodology

    • Comparable approach

      Method
      Estimation
      Statistic Estimate
      $26,704,000
      Market price range: $9.50M - $26.7M
      AI Estimate
      $19,594,000
      Market price range: $6.90M - $19.6M

    • Alternative Use

      Use
      Estimation
      OFFICE BUILDING
      $16,530,000
      Current use
      COMMERCIAL (GENERAL)
      $37,645,000
      Change: +128% Conversion: Easy
      RESTAURANT
      $24,830,000
      Change: +50% Conversion: Moderate

    Get a detailed, property-specific estimation — fast and free

    Location Insight

    • Map
    • Local Demand
    City
    Charleston
    County
    Charleston
    State
    South Carolina
    Longitude
    -79.9293
    Latitude
    32.7894
    CBSA code
    16700
    CBSA name
    CHARLESTON-NORTH CHARLESTON, SC METROPOLITAN STATISTICAL AREA

    Property Tax & Assessments

    Tax date
    Tax Amount
    Assessed Land Value
    Assessed Improvement Value
    Total Assessed Value
    Applied Tax Rate
    Land Market Value
    Improvement Market Value
    Total Market Value
    2023
    $561,777
    $0.00
    $0.00
    $2,029,730
    -
    $14,763,000
    $19,065,900
    $33,828,900

    Comparable in this City

    • Value Estimation
      $800,000
      1,509 SF

      112 Ashley Ave

      OFFICE BUILDING • 1,509 SF
      112 Ashley Ave, Charleston, SC 29401-1249
      View Details
    • Value Estimation
      $22,645,000
      51,545 SF

      261 Calhoun St

      OFFICE BUILDING • 51,545 SF
      261 Calhoun St, Charleston, SC 29401-1371
      View Details
    • Value Estimation
      $11,665,000
      30,840 SF

      34 Broad St Ste, Unit 200

      OFFICE BUILDING • 30,840 SF
      34 Broad St Ste, Charleston, SC 29401-3055
      View Details
    • Value Estimation
      $12,180,000
      22,914 SF

      205 King St

      OFFICE BUILDING • 22,914 SF
      205 King St, Charleston, SC 29401-3129
      View Details
    • Value Estimation by Request
      0.29 Acres

      18 Broad St, Unit 601

      OFFICE BUILDING • 0.29 Acres
      18 Broad St, Charleston, SC 29401-3015
      View Details
    • Value Estimation
      $1,470,000
      2,765 SF

      315 Meeting St

      OFFICE BUILDING • 2,765 SF
      315 Meeting St, Charleston, SC 29401
      View Details

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      Downtown Charleston Office Sublease Opportunity

      Premier office space available for sublease in downtown Charleston.
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      Charleston Historic Office Building

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      Downtown Office Suite For Sale

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      Historic Downtown Charleston Office Suite

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    Similar Nearby for Lease

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      Downtown Charleston Office Space Available

      Single-story office building in the heart of downtown Charleston.
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      View Details
    • $42 SF/Yr
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      Class A Office Space

      Prime office building in the heart of Historic Charleston.
      177 Meeting Street Rd, Charleston, SC 29401
      View Details
    • Contact for pricing

      Charleston Office Building with Harbor Views

      Renovated office suites with harbor views in historic Charleston.
      2 Cumberland St, Charleston, SC 29401
      View Details
    • $37 SF/Yr
      5,153 SF

      Class A Office Space

      Class A office space in downtown Charleston for lease.
      40 Calhoun St, Charleston, SC 29401
      View Details
    • $43 SF/Yr
      9,675 SF

      Class A Office Space

      Multi-tenant office building in Charleston's Historic District.
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      View Details
    • Contact for pricing

      Restored Office Space in Charleston

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      View Details
    View Listing
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    Charleston, SC 29401
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    Realmo Value Estimations

    Realmo estimates a property’s market value using a proprietary methodology that incorporates public data and user-submitted information. This cumulative value is generated by integrating a variety of conventional and innovative methods. 

    Disclaimer

    These figures are not official appraisals and should not be used as a substitute for a valuation performed by a licensed appraiser.
    Actual market value may differ due to factors not captured in the data. Estimates are offered for informational purposes only, and users should conduct independent research before making financial or investment decisions.
    By using this feature, you acknowledge that Realmo is not responsible for actions taken based on these estimates.

    AI approach

    Realmo AI Method estimates property value using machine learning models trained on millions of comparable listings, transactions, and market signals. It analyzes property features, location intelligence data, and current market dynamics to predict the most probable market value in real time.

    Realmo CapRate Calculation

    Realmo calculates the Capitalization Rate (Cap Rate) to help estimate a property's potential return on investment. The Cap Rate is a fundamental metric in commercial real estate that measures the relationship between a property's net operating income and its market value.

    How We Calculate Cap Rate

    Cap Rate Formula:
    Cap Rate (%) = (Net Operating Income / Property Value) × 100

    Net Operating Income (NOI) Formula:
    NOI = Area × Lease Rate × (1 - Vacancy Rate) × (1 - Operating Expense Ratio)

    Components

    Net Operating Income (NOI) represents the annual income a property generates after operating expenses:

    • Area: Building square footage from property records
    • Lease Rate: Annual $/sqft based on market data for the property type and geographic location
    • Vacancy Rate: Percentage of unoccupied space based on market data for the property type and location
    • Operating Expense Ratio: Operating costs as a percentage of income, varies by property type

    Property Value is derived from:

    • Recent sale price (if available)
    • Statistical models using comparable sales
    • AI-powered valuation estimates

    Example Calculation

    For a 100,000 sqft Office Building:

    • Lease Rate: $25.00/sqft/year (market data for Office in this area)
    • Vacancy Rate: 8% (market data for Office in this area)
    • Operating Expense Ratio: 35% (typical for Office properties)
    • Property Value: $15,000,000

    Step 1: Calculate NOI

    NOI = 100,000 × $25.00 × (1 - 0.08) × (1 - 0.35)
    NOI = 100,000 × $25.00 × 0.92 × 0.65
    NOI = $1,495,000/year

    Step 2: Calculate Cap Rate

    Cap Rate = ($1,495,000 / $15,000,000) × 100
    Cap Rate = 9.97%

    Property Type Considerations

    Net Operating Income calculations vary by property type due to different operating expense ratios:

    • Office: Higher expenses (30-40%) for HVAC, utilities, maintenance
    • Retail: Moderate expenses (25-35%) for common area maintenance
    • Industrial/Warehouse: Lower expenses (15-25%) for minimal tenant services
    • Multifamily: Moderate expenses (35-45%) including property management
    • Self-Storage: Lower expenses (25-35%) due to minimal maintenance

    Market lease rates and vacancy rates are specific to each property type and geographic location, reflecting local market conditions.

    Disclaimer

    These calculations are estimates for informational purposes only and should not be used as a substitute for professional financial analysis or appraisal.

    • Cap Rate calculations depend on market data that may change over time
    • Actual operating expenses, lease rates, and vacancy rates may differ from market averages
    • Individual property conditions, lease terms, and tenant quality significantly impact actual NOI
    • Property value estimates are approximations and not official appraisals
    • Cap rates vary widely by market, property condition, and investment risk profile

    Professional Guidance Recommended: Before making any investment or financial decisions, consult with licensed appraisers, commercial real estate brokers, and financial advisors who can evaluate your specific property and circumstances.
    By using this feature, you acknowledge that Realmo is not responsible for investment decisions or actions taken based on these estimates.

    Cap approach

    Capitalization Method calculates value based on estimated net operating income (NOI) and applying a market-based capitalization rate (cap rate), we estimate what a typical investor might be willing to pay for it.

    Comparable approach

    Comparable estimate is based on recent sales of similar nearby properties, adjusted for factors like size, condition, and location.

    Relative

    Relative property class coefficient uses factors that account for typical price differences between various asset types (e.g., retail vs. industrial) to provide a more accurate market-aligned estimate.

    Geo

    Comparable Sales Method, enhanced by Geo coefficients — location-based adjustment factors that reflect differences in price levels across neighborhoods, cities, or regions ensuring a more accurate, market-sensitive valuation.

    Stat Estimate

    This method estimates value based on actual market adjusted recent (~5 years) sales of comparable properties around by location and property type.

    • Ranges - area data calculated by industry standard IQR Outlier Removal Method
    • Range-from: 75% of all similar sales ($/sqft) are above this value
    • Range-to: 75% of all similar sales ($/sqft) are below this value
    AI Estimate

    This method estimates value based on AI market estimation of comparable properties around by location and property type.

    • Ranges - area data calculated by industry standard IQR Outlier Removal Method
    • Range-from: 75% of all estimations ($/sqft) are above this value
    • Range-to: 75% of all estimations ($/sqft) are below this value
    Alternative use

    Estimate considers the property’s potential value if used for a different purpose-based on zoning, demand, and market feasibility.

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    40 Calhoun St, Charleston, SC, 29401

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